

	var aa = function (id) {
				return "string" == typeof id ? document.getElementById(id) : id;
			}

			var Bind = function(object, fun) {
			    return function() {
			        return fun.apply(object, arguments);
			    }
			}

			function AutoComplete(obj,autoObj,arr){
				this.obj=aa(obj);        //输入框
				this.autoObj=aa(autoObj);//DIV的根节点
		  		this.value_arr=arr;        //不要包含重复值
				this.index=-1;          //当前选中的DIV的索引
				this.search_value="";   //保存当前搜索的字符
			}

			AutoComplete.prototype={
			    //初始化DIV的位置
			    init: function(){
			        this.autoObj.style.left = this.obj.offsetLeft + "px";
			        this.autoObj.style.top  = this.obj.offsetTop + this.obj.offsetHeight + "px";
			        this.autoObj.style.width= this.obj.offsetWidth - 2 + "px";//减去边框的长度2px
			    },
			    //删除自动完成需要的所有DIV
			    deleteDIV: function(){
			        while(this.autoObj.hasChildNodes()){
			            this.autoObj.removeChild(this.autoObj.firstChild);
			        }
			        this.autoObj.className="auto_hidden";
			    },
			    //设置值
			    setValue: function(_this){
			        return function(){
			            _this.obj.value=this.seq;
			            _this.autoObj.className="auto_hidden";
			        }
			    },
			    //模拟鼠标移动至DIV时，DIV高亮
			    autoOnmouseover: function(_this,_div_index){
			        return function(){
			            _this.index=_div_index;
			            var length = _this.autoObj.children.length;
			            for(var j=0;j<length;j++){
			                if(j!=_this.index ){
			                    _this.autoObj.childNodes[j].className='auto_onmouseout';
			                }else{
			                    _this.autoObj.childNodes[j].className='auto_onmouseover';
			                }
			            }
			        }
			    },
			    //更改classname
			    changeClassname: function(length){
			        for(var i=0;i<length;i++){
			            if(i!=this.index ){
			                this.autoObj.childNodes[i].className='auto_onmouseout';
			            }else{
			                this.autoObj.childNodes[i].className='auto_onmouseover';
			                this.obj.value=this.autoObj.childNodes[i].seq;
			            }
			        }
			    },
			    //响应键盘
			    pressKey: function(event){
			        var length = this.autoObj.children.length;
			        //光标键"↓"
			        if(event.keyCode==40){
			            ++this.index;
			            if(this.index>length){
			                this.index=0;
			            }else if(this.index==length){
			                this.obj.value=this.search_value;
			            }
			            this.changeClassname(length);
			        }
			        //光标键"↑"
			        else if(event.keyCode==38){
			            this.index--;
			            if(this.index<-1){
			                this.index=length - 1;
			            }else if(this.index==-1){
			                this.obj.value=this.search_value;
			            }
			            this.changeClassname(length);
			        }
			        //回车键
			        else if(event.keyCode==13){
			            this.autoObj.className="auto_hidden";
			            this.index=-1;
			        }else{
			            this.index=-1;
			        }
			    },
	    		//程序入口
			    start: function(event){
			        if(event.keyCode!=13&&event.keyCode!=38&&event.keyCode!=40){
			            this.init();
			            this.deleteDIV();
			            this.search_value=this.obj.value;
			            var valueArr=this.value_arr;
			            valueArr.sort();
			            if(this.obj.value.replace(/(^\s$)|(\s$)/g,'')==""){ return; }//值为空，退出
			            try{ var reg = new RegExp("(" + this.obj.value + ")","i");}
			            catch (e){ return; }
			            var div_index=0;//记录创建的DIV的索引
			            for(var i=0;i<valueArr.length;i++){
			                if(reg.test(valueArr[i])){
			                    var div = document.createElement("div");
			                    div.className="auto_onmouseout";
			                    div.seq=valueArr[i];
			                    div.onclick=this.setValue(this);
			                    div.onmouseover=this.autoOnmouseover(this,div_index);
			                    div.innerHTML=valueArr[i].replace(reg,"<strong>$1</strong>");//搜索到的字符粗体显示
			                    this.autoObj.appendChild(div);
			                    this.autoObj.className="auto_show";
			                    div_index++;
			                }
			            }
			        }
			        this.pressKey(event);
			        window.onresize=Bind(this,function(){this.init();});
			    }
			}
	